Yvonne Louise Georgette Loriod-Messiaen (20 January 1924 – 17 May 2010) was a French pianist, teacher, and composer, and the second wife of composer Olivier Messiaen. Her sister was the Ondes Martenot player Jeanne Loriod.

Loriod was born in Houilles, Yvelines to Gaston and Simone Loriod. Initially receiving piano lessons from her godmother, she later studied at the Paris Conservatoire and became one of Olivier Messiaen's most avid pupils. She also studied with Isidor Philipp, Lazare Lévy then Marcel Ciampi.